18) A free living anaerobic bacterium capable of N2
fixation in soil is

a) Azotobacterb) Streptococcusc) Clostridiumd) Rhizobium

19) Amino acids are synthesized froma)a-keto glutaric acid

b) Mineral acidsc) Fatty acidsd) Volatile acids

20) Which one of the following elements plays an important role in biological nitrogen fixation?a)Molybdenumb)Manganesec)Copperd)Zinc

21) Which of the following statements is correct?a)Legumes fix nitrogen only through specialized bacteria that live in their leavesb)Legumes are independently capable of fixing nitrogenc)Legumes fix nitrogen only through the specialized bacteria that live in their rootsd)none of the above

22) Lomentum is ana)Inflorescenceb)Seedc)Embryod)Fruit

23) Pericarp is extended to form a wing in thea)Acheneb)Samarac)Cypselad)Drupe

24) The edible part of a fig is thea)Mesocarpb)Endocarpc)Receptacled)Epicarp and mesocarp

25) Banana is a seedless fruit because the plant isa)Multiplied aseuallyb)Triploidc)Sprayed with auxind)A source of abundant cytokinins

26) The edible part of a grape is thea)Pericarp and placentaeb)Epicarp and mesocarpc)Mesocarpd)Mesocarp, endocarp and placentae

27) A fruit developed from a superior unilocular ovary which dehisces by one suture only is aa)Follicleb)Legumec)Siliculad)Siliqua

28) The coir of commerce is obtained froma)Endocarp of Coconutb)Mesocarp of Coconutc)Stem of Juted)Leaves of Coconut

29) A well developed aril occurs ina)Inga edulis and Nutmegb)Coconut and Groundnutc)Inga edulis and Cashewnutd)Cashewnut and Coconut

30) The fruit of Annona squamosa (Custad Apple) isa)Etaerio of berriesb)Etaerio of drupesc)Hypanthodiumd)Etaerio of achenes

31) In a certain fruit the pericarp is fused with the testa of the single seed. The fruit is a/ana)Nutb)Achenec)Utricled)Caryopsis

33) The bitterness of cucurbits is due to thea)Alkalinity of pulpb)Acidityc)Triterpenesd)Bitter seeds

34) Which one of the following groups contains fruits belonging to the same category?a)Cashewnut, Coconut and Chestnutb)Coconut, Orange and Tomatoc)Betelnut, Chestnut and Coconutd)Mango, Almond and Coconut

35) The edible part of a guava is thea)Thalamus and pericarpb)Entire fruitc)Endocarpd)None of the above

36) Which plant will lose its economic value if the fruits are induced through parthenocarpy?a)Orangeb)Bananac)Pomegranated)Grape

37) A cypsela is a fruit whicha)Develops from a syncarpous, inferior, single seeded ovaryb)Does not have a fruit wallc)Has a fruit wall fused with the seed coatd)Has a fleshy pericarp

38) An example of a geocarpic fruit isa)Mangob)Orangec)Water Melond)Peanut

39) A single seeded fruit develops from aa)Tricarpellary ovaryb)Bicarpellary syncarpous ovaryc)Multicarpellary syncarpous ovaryd)Pistil having single ovule

40) Jack Fruit is a multiple fruit formed from a/ana)Single ripened ovaryb)Inflorescencec)Flower with many free carpelsd)Flower with many partially fused carpels

41) A dry indehiscent fruit is called aa)Caryopsisb)Folliclec)Capsuled)Pod

52) The coleorhiza is a cap-like covering over thea)Radicle in dicotsb)Plumule in dicotsc)Plumule in monocotsd)Radicle in monocots

53) 10. During seed germination, the seed coat ruptures due toa)Differentiation of the cotyledonsb)Massive glycolysis in endosperm and cotyledonsc)Massive imbibition of waterd)Sudden increase in cell division

54) In groundnuts, oil is stored ina)Embryo axisb)Endospermc)Cotyledonsd)None of the above

55) In a cereal grain, the single cotyledon is represented by thea)Coleoptileb)Coleorhizac)Scutellumd)Prophyll

56) Clematis and Naravelia are dispersed by air with the help of thea)Persistent inflated calyxb)Persistent hairy stylec)haird)Wings

57) The censer mechanism of seed dispersal is found ina)Papaveraceaeb)Liliaceaec)Leguminosaed)Rosaceae

58) A weed belonging to family Asteraceae which has spread to all parts of India isa)Nicotianab)Oryzac)Partheniumd)Hordeum

59) The flowers of Asteraceae area)Hypogynousb)Epigynousc)Perigynousd)Semi-epigynous

81) A bicollateral vascular bundle is characterised bya)Phloem being sandwitched between xylemb)Transverse splitting of vascular bundlec)Longitudinal splitting of vascular bundled)Xylem being sandwitched between phloem

86) The type of sclereids found in the seed coat of pulses area)Macrosclereidsb)Brachysclereidsc)Osteosclereidsd)Asterosclereids

87) Which is wrong about sieve tube elements?a)Peripheral cytoplasm and large vacuolcb)Perforated end wall becomes impregnated with ligninc)P-proteins occus evenly distributed throughout lumend)Absence of nucleus at maturity

88) Collenchyma isa)Living with no reserve foodb)Living with protoplasmc)Dead and hollowd)Dead with reserve food

89) Chickle/chewing gum was formerly obtained from the latex ofa)Manihotb)Achrasc)Papayad)Yucca

90) Exchange of gases in old stems takes place froma)Stomatab)Hydathodesc)Lenticelsd)Passage cells

91) The oldest layer of secondary phloem in a dicot stem is located justa)Outside the vascular cambiumb)Inside the vascular cambiumc)Inside the primary phloemd)Outside the secondary xylem

93) When secondary growth in thickness is initiated in a dicot root, which of the following happens first?a)Cambial initials between xylem and phloem divideb)Pericycle strands outside the primary xylem dividec)Anticlinal divisions takes place so that the cambium becomes circulard)Parenchymatous cells between xylem and phloem become meristematic

94) Cork is an excellent material for making bottle stoppers because it isa)Cheapb)Easily availablec)Air tightd)Light